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Analog Devices Inc. AD7899ARSZ-1REEL7
- Part No.:
- AD7899ARSZ-1REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
AD7899ARSZ-1REEL7.pdf
- Description:
- IC ADC 14BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,327
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Product details
Overview
AD7899ARSZ-1REEL7 from Analog Devices is a 14-bit, 400 kSPS successive-approximation ADC with integrated track/hold, 2.5 V reference, and high-speed parallel interface. It operates from a single 5 V supply, supports ±10 V and ±5 V bipolar input ranges, delivers 78 dB SNR at 100 kHz input, and features 2.2 µs conversion time and 0.3 µs track/hold acquisition - used in precision data acquisition systems for industrial process control.
For engineers reviewing the AD7899ARSZ-1REEL7 datasheet, AD7899ARSZ-1REEL7 pinout, AD7899ARSZ-1REEL7 application, or AD7899ARSZ-1REEL7 equivalent, key selection criteria include bipolar input range support (±10 V/±5 V), internal reference accuracy (±20 mV over temperature), 14-bit no-missing-codes performance, and compatibility with both 3 V and 5 V digital logic via VDRIVE pin.
Technical Context
The AD7899ARSZ-1REEL7 implements a laser-trimmed internal clock oscillator enabling fixed 400 kSPS throughput without external timing components; alternatively, an external 6.5 MHz clock may be applied via CLKIN to synchronize multiple converters. Its track/hold architecture achieves 500 kHz –0.1 dB full-power bandwidth and 4.5 MHz –3 dB bandwidth, supporting accurate digitization of fast transient signals.
Conversion control uses edge-triggered CONVST to initiate hold mode and start conversion, with BUSY/EOC indicating completion. Data is latched and read via 14-bit parallel bus (DB0–DB13) using CS and RD strobes, supporting direct interfacing to microcontrollers and DSPs operating at either 3 V or 5 V logic levels through configurable VDRIVE.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with guaranteed no missing codes - ensures monotonicity and deterministic code transitions across full input range. |
| Throughput Rate | 400 kSPS maximum - enables real-time sampling of signals up to 200 kHz Nyquist frequency. |
| Input Range | ±10 V or ±5 V bipolar - supports standard industrial sensor outputs without external signal conditioning. |
| SNR @ 100 kHz | 78 dB minimum - provides >12.6 effective bits for high-fidelity measurement in noisy environments. |
| Conversion Time | 2.2 µs maximum - defines minimum inter-conversion interval and sets system latency bound. |
| Track/Hold Acquisition | 0.3 µs maximum - determines minimum settling time before next CONVST pulse, critical for burst-mode sampling. |
| Reference Voltage | 2.5 V ±20 mV over temperature - establishes absolute scaling for analog-to-digital conversion with known error budget. |
Pinout & Package
AD7899ARSZ-1REEL7 is housed in a 28-lead Shrink Small Outline Package (SSOP), RoHS-compliant, with 0.65 mm lead pitch and exposed pad for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF | Reference Input/Output | Access point for internal 2.5 V reference; accepts external 2.5 V ±5% reference to override internal source. |
| VINA, VINB | Analog Inputs | Differential input pair supporting ±10 V (VINB = AGND) or ±5 V (VINA = VINB) configurations per AD7899-1 spec. |
| CONVST | Convert Start Input | Rising-edge-triggered control that places track/hold into hold mode and initiates conversion sequence. |
| BUSY/EOC | Status Output | Open-drain dual-function signal: high during conversion (BUSY), low at completion (EOC) when CONVST is low. |
| DB0–DB13 | Data Outputs | 14-bit three-state parallel bus delivering conversion result; compatible with 3 V or 5 V logic depending on VDRIVE setting. |
| VDRIVE | Digital I/O Supply | Independent power rail for digital interface - set to 3 V for interfacing with low-voltage processors or 5 V for legacy systems. |
| STBY | Standby Mode Control | Active-low input reducing supply current to 20 µA typical - enables rapid wake-up (<5 µs) for power-sensitive applications. |
Key Features
| Feature | Design Value |
|---|---|
| Single 5 V supply operation | Eliminates need for dual ±15 V rails common in legacy data acquisition, simplifying power design and reducing BOM cost. |
| Overvoltage protection | Withstands ±18 V on analog inputs (±10 V range) without damage - protects against transients and wiring errors in industrial field environments. |
| Configurable logic voltage | VDRIVE pin allows seamless integration with 3 V microcontrollers or 5 V FPGAs without level-shifting circuitry. |
| Internal clock oscillator | Laser-trimmed oscillator delivers stable 400 kSPS rate - removes external crystal/clock generator and associated layout complexity. |
| Low power consumption | 80 mW typical active power and 20 µA standby current - suitable for battery-backed or thermally constrained embedded systems. |
Applications
| Industrial Process Monitoring | Test & Measurement Equipment |
|---|---|
Use Scenario: Continuous monitoring of pressure, temperature, and flow sensors in PLC-based control cabinets with ±10 V analog outputs. IC Role / Device Role / Timing Role: Primary ADC capturing synchronized multi-channel sensor data at 400 kSPS with deterministic latency via CONVST-triggered sampling. Use Value: Bipolar input range eliminates need for external level-shifting; internal reference ensures consistent scaling across distributed I/O modules. | Use Scenario: Digitizing waveform signals in portable oscilloscopes and automated test fixtures requiring high dynamic range and low noise floor. IC Role / Device Role / Timing Role: High-fidelity front-end ADC providing 78 dB SNR and <1 LSB INL for accurate amplitude and distortion analysis. Use Value: 0.3 µs track/hold acquisition enables tight inter-sample timing control essential for FFT-based spectral analysis. |
| Motor Drive Current Sensing | Avionics Sensor Interface |
Use Scenario: Isolated phase current measurement in servo drives using shunt resistors with ±5 V output amplifiers. IC Role / Device Role / Timing Role: Precision ADC capturing fast current transients during PWM switching cycles with minimal aperture jitter (25 ps). Use Value: Overvoltage tolerance (–9 V to +18 V) withstands inductive kickback; 2.2 µs conversion time supports high-bandwidth closed-loop control. | Use Scenario: Interfacing with MIL-STD-1553 or ARINC 429 sensor transducers in ruggedized flight data recorders operating across –55°C to +125°C. IC Role / Device Role / Timing Role: Radiation-tolerant ADC variant (S-grade) performing reliable digitization under extreme thermal cycling and vibration. Use Value: Specified performance over full military temperature range with ±2 LSB INL ensures calibration stability in safety-critical avionics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 14-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7899AR-1 | Same core architecture and pinout, but in 28-lead SOIC package (R-28) instead of SSOP (RS-28); slightly higher θJA (95°C/W vs. 95°C/W, identical thermal rating). | Preferred where board space permits larger SOIC footprint and hand-soldering or legacy reflow profiles are used. | Select AD7899AR-1 if SSOP assembly capability is unavailable or if mechanical robustness under thermal cycling favors SOIC lead form. |
| AD7682BCPZ-RL7 | 16-bit, 250 kSPS SAR ADC with SPI interface only; no parallel bus, no internal reference, requires external 2.5 V reference and VIO supply. | Suitable for new designs prioritizing resolution over speed and accepting serial interface trade-offs for reduced pin count and PCB area. | Choose AD7682BCPZ-RL7 when higher resolution (16-bit) justifies lower throughput and serial interface simplifies routing in dense layouts. |
Compared with AD7899AR-1, AD7899ARSZ-1REEL7 offers identical electrical performance in a smaller SSOP package ideal for space-constrained industrial modules; versus AD7682BCPZ-RL7, it trades 2-bit resolution for 60% higher throughput and parallel interface compatibility with legacy controller buses.
Availability
AD7899ARSZ-1REEL7 is available at Aetrix Electronics and suitable for industrial process monitoring, test & measurement equipment, motor drive current sensing, and avionics sensor interface requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7899ARSZ-1REEL7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and aerospace markets since 1965.
The AD7899 product line delivers high-speed, low-power 14-bit SAR ADCs with integrated references and flexible digital interfaces - designed specifically for precision data acquisition in harsh, space- or power-constrained environments.
FAQ
What input voltage ranges does the AD7899ARSZ-1REEL7 support?
The AD7899ARSZ-1REEL7 supports ±10 V and ±5 V bipolar input ranges as defined for the AD7899-1 variant. Configuration is achieved by connecting VINB to AGND for ±10 V operation or tying VINA and VINB together for ±5 V operation. The device does not support unipolar (0 V to 5 V) or ±2.5 V ranges - those require AD7899-2 or AD7899-3 variants respectively.
Does the AD7899ARSZ-1REEL7 require an external reference voltage?
No, the AD7899ARSZ-1REEL7 includes an internal 2.5 V reference with ±20 mV error over temperature. A 0.1 µF capacitor must be placed between VREF and AGND to stabilize it. An external 2.5 V ±5% reference may be applied to the VREF pin to override the internal source when higher accuracy or system-level reference synchronization is required.
How is the digital interface of the AD7899ARSZ-1REEL7 configured for 3 V microcontrollers?
The AD7899ARSZ-1REEL7 uses the VDRIVE pin to set digital I/O voltage level. To interface with 3 V microcontrollers, connect VDRIVE to a clean 3 V ±10% supply (not VDD). This configures DB0–DB13, BUSY/EOC, RD, CS, CONVST, and STBY to operate at 3 V logic thresholds while maintaining full functionality and timing compliance per datasheet specifications.
What is the purpose of the STBY pin on the AD7899ARSZ-1REEL7?
The STBY pin on the AD7899ARSZ-1REEL7 controls power-down mode: driven low to enter standby, reducing IDD to 20 µA typical. In standby, the internal reference and oscillator remain active, enabling wake-up within 5 µs of STBY going high. This feature supports energy-efficient burst-mode acquisition in battery-powered or thermally sensitive systems without losing calibration state.
Can the AD7899ARSZ-1REEL7 be used with an external clock source?
Yes, the AD7899ARSZ-1REEL7 accepts an external clock via the CLKIN pin. When CLKIN is high on the rising edge of CONVST, the device uses the external clock (up to 6.5 MHz) for conversion timing. The internal oscillator remains disabled. External clocking enables precise synchronization across multiple AD7899 devices or alignment with system master clocks, though maximum throughput remains limited to 400 kSPS.
AD7899ARSZ-1REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 400k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7899ARSZ-1REEL7 FAQ
1.How can I place an order for AD7899ARSZ-1REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7899ARSZ-1REEL7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD7899ARSZ-1REEL7 reliable?
The price and inventory of AD7899ARSZ-1REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7899ARSZ-1REEL7 is usually 5 days.
3.What payment methods are accepted for AD7899ARSZ-1REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7899ARSZ-1REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7899ARSZ-1REEL7?
AD7899ARSZ-1REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7899ARSZ-1REEL7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD7899ARSZ-1REEL7?
For technical support, including AD7899ARSZ-1REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7899ARSZ-1REEL7 requirements.
6.How does Aetrix verify that AD7899ARSZ-1REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7899ARSZ-1REEL7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD7899ARSZ-1REEL7 meets industry standards.
7.What is the process for return or replacement of AD7899ARSZ-1REEL7?
All AD7899ARSZ-1REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7899ARSZ-1REEL7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD7899ARSZ-1REEL7 part is unused and in its original packaging.
Return procedure for AD7899ARSZ-1REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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